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• of vegetation establishment and readiness for grazing according to 4.15.5(2)• <br />' For this demonstration, xe rill mow a plot 20 by 200 feet to a stubble <br />he 3ht of four inches about June 1, July 1, August 1 and September 1. <br />Mien in August Y6 Division officials will be invited to inspect the area. <br />Fencing and livestock-watering facilities will be completed in Y6. <br />D.1.3. Activities in Y7 and Y8 <br />Pith approval of the Division, grazing will be permitted at average stocking <br />rates for the area in June through September Y~ and Y8. In the event of <br />drought, grazing x111 be suspended when the average stubble height of <br />prairie, sandreed drops to six inches. Stocking records x111 be maintained. <br />D.1.4. Activities in Y9 and Y10 <br />These are the years in xhich xe must obtain pioof of success, and in xhich <br />xe desire to measure the required attributes of both revegetated and <br />• referonce areas without grazing to avoid the usa of cages. rich should be <br />used only as a last resort. Tb fulfill the alternate requirement of <br />simulated grazing in these years (if required), xe propose to mow a strip <br />20 feet ride across the entire area to a stubble height of four inches about <br />June 1, July 1, August 1 and September 1 of Y9, and a aisilar strip in Y10. <br />Wider strips xould not be appropriate because of effects on sandsage. 'fie <br />mown strips rill be avoided when measuring sandsage density aad groxth <br />performance. <br />D. 2. Measurements of Success <br />D.2.1. General sampling Procedure <br />iie rill construct a 100-point grid of the revegetated area and select at <br />random 15 to 20 points for plot locations. This sampling will not be <br />stratified by subsites, because subsite acreages encompassed will be measured <br />from the pre-mining soil survey and entered into the xeighted-average <br />method of 4.15.y(4)(b). 'fie revegetated-areas will be saapled to determine <br />13 <br />